iwlwifi: mvm: fix locking in iwl_mvm_ipv6_addr_change

inet6_dev->lock can be taken from a timer. Disabled bottom
halves when we take it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c
index 9a95c374990d..5b2c675a8752 100644
--- a/drivers/net/wireless/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/iwlwifi/mvm/d3.c
@@ -97,14 +97,14 @@ void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
         struct inet6_ifaddr *ifa;
         int idx = 0;
 
-        read_lock(&idev->lock);
+        read_lock_bh(&idev->lock);
         list_for_each_entry(ifa, &idev->addr_list, if_list) {
                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
                 idx++;
                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
                         break;
         }
-        read_unlock(&idev->lock);
+        read_unlock_bh(&idev->lock);
 
         mvmvif->num_target_ipv6_addrs = idx;
 }